whenever me and my boyfriend have sex, he always asks me to be on top but im too nervous to do that!! so i always tell him no and he hates it...he said it would be easier if i was on top. I DONT KNOW WHAT TO DO THOUGH!! whenever i try to imagine it, it doesnt seem like it would work right. I need more confidence. what do i do?!? somebody help please?? I want to be on top but im just not sure how to do it